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Finding the Fourth Proportional to 536,621.78, 803,604.05 and 394,129.16

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Solution

The fourth proportional to 536,621.78, 803,604.05 and 394,129.16 is: 590,217.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    536,621.78 : 803,604.05 = 394,129.16 : x
  2. Step 2: Convert to fraction form
    536,621.78/803,604.05 = 394,129.16/x
  3. Step 3: Cross multiply
    536,621.78x = 803,604.05 × 394,129.16
  4. Step 4: Simplify right side
    536,621.78x = 316,723,789,918.91
  5. Step 5: Solve for x
    x = 316,723,789,918.91/536,621.78
  6. Step 6: Final answer
    x = 590,217.92

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.